Why medicine?
Dr. Saad Selema graduated from medical school, then devoted himself to gold trading and manufacturing at Selema Gold, the family company since 1968. That is where the idea came from: most investor mistakes have a familiar counterpart in medicine, such as an overdose, a misdiagnosis or side effects.
A medical analogy makes an idea clearer and easier to remember. A patient who understands why the dose matters sticks to it, and so does an investor.